CN205029277U - High -voltage common -box bus - Google Patents

Abstract

The utility model discloses a high-voltage common-box busbar, which comprises a shell and a mounting plate welded on the bottom of the shell. A post insulator is fixed on the mounting plate. A conductor is arranged on the top of the post insulator. The cross section of the conductor is U-shaped or L-shaped. The insulator and the conductor are connected by bolts. The bolts are hexagon bolts. The conductor is specifically an open-slot aluminum plate or an open-slot copper plate. The high-voltage common box busbar includes several groups of insulators, and the number of each group of insulators is three; the opening directions of the conductors at the top of each group of insulators are the same. The opening directions of all the conductors are towards one side. All conductors have the same thickness. The above-mentioned high-voltage common-box bus can make the cross-section of the conductor small, carry a large current, and reduce power loss, thereby reducing the loss of energy and materials; in this way, the problem of high energy loss of the high-voltage common-box bus can be solved.

Description

A high-voltage common box busbar

technical field

The utility model relates to the technical field of electrical engineering, in particular to a high-voltage common-box busbar.

Background technique

With the continuous development of my country's electric power construction, the market demand for various types of high-voltage common box busbars is increasing.

We know that the high-voltage common box busbar is one of the key equipment in the high-voltage power transmission and transformation system; it has excellent short-circuit resistance, and can effectively weaken the eddy current or circulation caused by the protection of the aluminum (or weak magnetic steel plate) shell. The structure heats up, reduces the temperature of the closed busbar shell, reduces power loss, increases the carrying capacity, and reduces electric power.

In addition, the high-voltage common box busbar is widely used between the generator lead-out line of 100MW and below and the low-voltage side of the main transformer, or for the current transmission between the low-voltage side of the factory transformer and the high-voltage power distribution device of the 75MW and above unit; at the same time, the high-voltage common The box busbar can also be used for the AC and DC excitation circuit of the generator, the electricity used in the substation is introduced into the busbar or the power leads of other industrial and civil facilities.

In the prior art, most of the high-voltage common-box busbars are aluminum alloy welded shells, and a mounting plate is welded on the inner bottom of the shell, and a group of post insulators are fixedly connected to the mounting plate, and a set of fittings are fixedly connected to the post insulators, and then the The conductor is fixed by fittings, the conductor is a rectangular aluminum bar or a rectangular copper bar, its disadvantages are: a set of conductors for the high-voltage common box busbar needs to use 1-3 rectangular busbars, the conductor cross-section is large, the current carrying capacity is small, the power loss is large, and the power conversion Because the heat energy is lost in the air, resulting in the loss of energy and materials; and the fixing hardware used is also a loss of materials.

Therefore, how to reduce energy loss is a technical problem that those skilled in the art need to solve.

Utility model content

The purpose of the utility model is to provide a high-voltage common-box busbar, which can solve the problem of high energy loss.

In order to achieve the above purpose, the utility model provides a high-voltage common-box busbar, which includes a shell and a mounting plate welded to the bottom of the shell, a post insulator is fixed on the mounting plate, and a conductor is arranged on the top of the post insulator. The section of the conductor is U-shaped or L-shaped.

Preferably, the insulator is connected to the conductor through bolts.

Preferably, the bolts are hexagon bolts.

Preferably, the conductor is specifically an open-slot aluminum plate or an open-slot copper plate.

Preferably, several groups of insulators are included, and the number of insulators in each group is three; the opening direction of the conductor at the top of each group of insulators is the same.

Preferably, the opening directions of all the conductors are towards one side.

Preferably, all the conductors have the same thickness.

Compared with the above-mentioned background technology, the high-voltage common box busbar of the present invention, the shell and the mounting plate welded to the bottom of the shell, the mounting plate is fixed with a post insulator, the top of the post insulator is provided with a conductor, and the cross section of the conductor is U-shaped or L-shaped ; Because the cross-section of the conductor is U-shaped or L-shaped, rather than the traditional rectangle; in this way, the cross-section of the U-shaped or L-shaped conductor has a small cross-section and a large current-carrying, which reduces the power loss, thereby reducing the energy consumption. and material loss; the above-mentioned setting method can solve the problem of high energy loss of the high-voltage common box busbar.

Description of drawings

Fig. 1 is the structural representation of the high-voltage common box bus provided by the utility model embodiment;

in:

Shell 1, mounting plate 2, insulator 3, bolt 4, conductor 5.

detailed description

The core of the utility model is to provide a high-voltage common-box busbar, which can reduce energy loss.

In order to enable those skilled in the art to better understand the solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 1 , which is a schematic structural diagram of a high-voltage common-box busbar provided by an embodiment of the present invention.

The high-voltage common box busbar involved in the utility model usually includes a housing 1 and a mounting plate 2; the housing 1 and the mounting plate 2 cooperate to form a cavity; and the housing 1 and the mounting plate 2 are welded into one body; it should be noted that the housing 1 can be The aluminum alloy welded shell or other weak magnetic steel shell is used, which can effectively reduce the structural heating caused by eddy current or circulating current, reduce the temperature of the closed busbar shell, reduce the power loss, increase the carrying capacity, and reduce the electric power. As for the specific material of the shell 1, no specific limitation is made herein.

An insulator 3 is arranged in the cavity formed by the cooperation of the shell 1 and the installation board 2 ; and the insulator 3 is fixed on the installation board 2 . For the fixing between the insulator 3 and the mounting plate 2, bolt connection or other connection methods may be used, which will not be described in detail herein.

It should be noted that, in this paper, it is preferable to weld the shell 1 and the mounting plate 2 together to ensure the structural stability of the high-voltage common box busbar; of course, according to different needs, the shell 1 and the mounting plate 2 can also be connected in other ways, here will be No more elaboration.

On the above basis, the top of the insulator 3 is provided with a conductor 5; as shown in Figure 1 of the specification. The section of the conductor 5 is U-shaped or L-shaped; obviously, it can be seen that the conductor 5 is roughly half a rectangle; Compared with one or more rectangles in the prior art, the cross-section of the U-shaped or L-shaped conductor 5 is reduced, so that the current carrying capacity is increased and the power loss is small. In this way, the use of the conductor 5 with an open cross-section can not only realize the function of the high-voltage common box bus, but also reduce energy loss.

To optimize the above embodiment, the insulator 3 and the conductor 5 are connected by bolts 4 . And it is preferable to set the bolt 4 as an external hexagon bolt. That is to say, in order to ensure the fixed connection between the insulator 3 and the conductor 5, a through hole is opened on one side of the open conductor 5, and the bolt 4 is used to pass through the through hole of the conductor 5 and be connected with the insulator 3, so that The purpose of fixed connection between the insulator 3 and the conductor 5 can be realized conveniently.

In addition, since the conductor 5 is set as U-shaped or L-shaped as shown in Figure 1 of the specification, only opening a through hole on one side of the conductor 5 can realize the purpose of connecting the conductor 5 to the insulator 3 by using the bolt 4; This saves the use of fixing fittings; that is, it does not need to use other fittings with complex structures to connect the conductor 5 and the insulator 3 ; thus, the difficulty of installation can be reduced and the assembly efficiency can be improved.

Of course, according to actual needs, bolt 4 is not limited to the outer hexagonal bolts described herein, and can also be set to other bolts of different shapes, such as ordinary bolts or octagonal bolts; other bolts of different shapes should also be within the scope of protection of this article , which will not be repeated in this paper.

In order to clarify the shape and structure of the conductor 5, the conductor 5 can be set as grooved aluminum (angle aluminum) or grooved copper (angle copper); the specific shape is shown in Figure 1 of the specification. That is to say, in order to mass-produce the conductor 5 , a special mold can be used to draw and form an aluminum plate or a copper plate, so as to obtain the above-mentioned conductor 5 with a U-shaped or L-shaped cross-section. There are many ways to shape the conductor 5, and it is not limited to drawing.

The cross-section of the conductor 5 can be reduced by using an aluminum plate or a copper plate, and it can be processed and shaped conveniently.

According to the actual situation, the high-voltage common box busbar includes three insulators 3, which are used to install the three busbars respectively, and in this paper, the opening directions of the conductors 5 at the tops of the three insulators 3 are set to be consistent.

It can be seen from the accompanying drawing 1 of the specification that the high-voltage common box busbar can be provided with several groups of insulators 3, and the number of each group of insulators 3 is three; that is, the top of each insulator 3 is provided with a conductor 5, and each group of insulators 3 The opening directions of the conductors 5 at the top are set to be consistent; in addition, the openings of all the conductors 5 can also be set to one side; that is, to the left or right of the high-voltage common box bus.

Specifically, the open conductor 5 includes two sides and a bottom; as the conductor 5 shown in Figure 1 of the specification, its bottom is on the left side, the two sides are respectively in the up and down direction, and its opening on the right side; of course, the bottom edge of the conductor 5 can also be set on the right side, the two sides are respectively located in the up and down direction, and the opening is located on the left side. No matter which arrangement method is adopted, the purposes of reducing the cross-section of the conductor 5 mentioned above, increasing its current carrying capacity and reducing power loss can be achieved.

More preferably, the thicknesses of all the conductors 5 are set to be consistent. Since the thicknesses of the three conductors 5 are consistent, the interchangeability is improved, which is beneficial to reduce the difficulty of replacement, so that the conductors 5 can be replaced conveniently.

Of course, according to actual needs, the thickness of each part of each conductor 5 can be determined according to actual conditions, which will not be repeated herein.

The high-voltage common-box busbar provided by the utility model has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (7)

1. A high-voltage common box busbar, characterized in that it comprises a housing (1) and a mounting plate (2) welded to the bottom of the housing (1), and a post insulator (3) is fixed on the mounting plate (2) , the top of the post insulator (3) is provided with a conductor (5), and the section of the conductor is U-shaped or L-shaped. 2. The high-voltage common-box busbar according to claim 1, characterized in that the post insulator (3) and the conductor (5) are connected by bolts (4). 3. The high-voltage common-box busbar according to claim 2, characterized in that, the bolts (4) are hexagon bolts. 4. The high-voltage common-box busbar according to any one of claims 1 to 3, characterized in that the conductor (5) is specifically an aluminum plate or a copper plate. 5. The high-voltage common-box busbar according to claim 4, characterized in that, said high-voltage common-box busbar comprises several groups of said insulators (3), and the number of each group of said insulators (3) is three; The opening directions of the conductors (5) at the top of the group of the insulators (3) are the same. 6. The high-voltage common-box busbar according to claim 5, characterized in that the opening directions of all the conductors (5) are facing one side. 7. The high-voltage common-box busbar according to claim 6, characterized in that all the conductors (5) have the same thickness.